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Without any additional measures alwitra upstands ensure excellent thermal insulation up to every corner: U-value: 1.0 W/m²K according to EN 12567-2 white inner side, smooth or lightly textured PVC CE marking in connection with alwitra rooflights according to DIN EN 1873 EVALON® and EVALASTIC® collars for perfect and fast waterproofing alwitra upstands are optionally available […]

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Rooflights for flat roofs

Types of the alwitra rooflightsAs standard, alwitra rooflights are available as double-shell, triple-shell or multi-shell versions with additional thermal insulation properties. The thermally insulating version provides optimum thermal protection as well as outstanding lighting of the room through efficient light dispersion and low light loss. alwitra rooflights are equipped with a burglary-retardant screw system.  Opening […]

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